US Bridges

SH 36 over Bear River

Fair

Franklin County, Idaho · 3.5 E. JCT SH 34 & SH 36 · Structure no. 000000000014075

Built
1960
65 years old, rebuilt 2007
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
113 ft
3 main spans
Daily traffic
1,300
2023 count
Owner
State
State Highway Agency

About this bridge

SH 36 over Bear River is a concrete stringer/multi-beam or girder carrying SH 36 over Bear River in Franklin County, Idaho. It was built in 1960 and reconstructed in 2007, so it is 65 years old, older than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,300 vehicles a day, roughly 16% of them trucks, projected to reach 1,950 by 2042. The structure is 113 ft (34.4 m) long and 29 ft wide. If it were closed, the detour would be 60.3 mi (97 km).

Location

Open in Google Maps
CarriesSH 36
CrossesBear River
Location3.5 E. JCT SH 34 & SH 36
RouteState Highway 36
CountyFranklin County
StateIdaho
Coordinates42.193, -111.77883
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating31 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length113 ft (34.4 m)
Longest span37 ft (11.3 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,300 (2023)
Projected traffic1,950 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed60.3 mi (97 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.2 million (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 36 over Bear River built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2007.

What condition is SH 36 over Bear River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2023.

How much traffic does SH 36 over Bear River carry?

About 1,300 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is SH 36 over Bear River?

The structure is 113 ft (34.4 m) long with a longest span of 37 ft (11.3 m) and a deck 29 ft wide.

Who owns SH 36 over Bear River?

It is owned by the State Highway Agency.